23240021421361 has 2 divisors, whose sum is σ = 23240021421362. Its totient is φ = 23240021421360.

The previous prime is 23240021421349. The next prime is 23240021421457. The reversal of 23240021421361 is 16312412004232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14815840248225 + 8424181173136 = 3849135^2 + 2902444^2 .

It is a cyclic number.

It is not a de Polignac number, because 23240021421361 - 2⁵ = 23240021421329 is a prime.

It is not a weakly prime, because it can be changed into another prime (23240021421301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11620010710680 + 11620010710681.

It is an arithmetic number, because the mean of its divisors is an integer number (11620010710681).

Almost surely, 2^{23240021421361} is an apocalyptic number.

It is an amenable number.

23240021421361 is a deficient number, since it is larger than the sum of its proper divisors (1).

23240021421361 is an equidigital number, since it uses as much as digits as its factorization.

23240021421361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 23240021421361 its reverse (16312412004232), we get a palindrome (39552433425593).

The spelling of 23240021421361 in words is "twenty-three trillion, two hundred forty billion, twenty-one million, four hundred twenty-one thousand, three hundred sixty-one".